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Absorbent for recycling sulfur dioxide from industrial waste gas and recycling method

A technology for sulfur dioxide and industrial waste gas, applied in chemical instruments and methods, separation methods, and separation of dispersed particles, etc., can solve the problems of small absorption capacity, high regeneration energy consumption, and high solvent price, and achieve large absorption capacity and low regeneration energy consumption , The effect of low solvent price

Active Publication Date: 2014-07-09
江苏蓝电环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the above methods all have disadvantages such as small absorption capacity, high regeneration energy consumption, and high solvent price.

Method used

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  • Absorbent for recycling sulfur dioxide from industrial waste gas and recycling method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the reaction kettle equipped with a thermometer, agitator, feeder, and cooler, add 100 mol of piperazine and 250 mol of water in sequence. After stirring evenly, replace the air in the reaction kettle with nitrogen and maintain the nitrogen flow. Add 125 mol of ethylene oxide dropwise, the dropwise addition is completed in 1 hour, and then react for 3 hours, and control the reaction temperature to 80°C, the pressure during the reaction is 0.2MPa, then add 20g of boric acid to the reactant, and react for 0.5 hours to obtain organic amine Salt. The organic amine salt is dissolved in water to make an organic amine salt aqueous solution with a concentration of 20% by mass to obtain an absorbent.

Embodiment 2

[0033] In the reaction kettle equipped with a thermometer, agitator, feeder, and cooler, add 100 mol of piperazine and 200 mol of water in sequence. After stirring evenly, replace the air in the reaction kettle with nitrogen and maintain the nitrogen flow. 120 mol of ethylene oxide was added dropwise, the reaction temperature was controlled to be 60°C, the pressure during the reaction was 0.1MPa, the dropwise addition was completed in 1 hour, and the reaction was continued for 2 hours, then 18g of boric acid was added to the reactant, and the reaction was carried out for 1.5 hours to obtain organic amine salt. The organic amine amine salt is dissolved in water to prepare an organic amine salt aqueous solution with a concentration of 4% by mass to obtain an absorbent.

Embodiment 3

[0035] In the reaction kettle equipped with a thermometer, agitator, feeder, and cooler, add 100 mol of piperazine and 400 mol of water in sequence. After stirring evenly, replace the air in the reaction kettle with nitrogen and maintain the nitrogen flow. 150 mol of ethylene oxide was added dropwise, the reaction temperature was controlled to be 100°C, the pressure during the reaction was 0.4MPa, the dropwise addition was completed in 1.5 hours, and the reaction was continued for 3.5 hours, then 20 g of boric acid was added to the reactant, and the reaction was carried out for 3 hours to obtain organic amine salt. The organic amine amine salt is dissolved in water to prepare an organic amine salt aqueous solution with a concentration of 35% by mass to obtain an absorbent.

[0036] The specific absorption method is;

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Abstract

The invention particularly relates to an amine salt solution absorbent and a method for recycling sulfur dioxide from industrial waste gas. The absorbent is prepared by virtue of the following steps: firstly, mixing piperazine and water and uniformly agitating, and adding ethylene oxide to react under an agitating state; secondly, taking a reaction product and boric acid to react to obtain an organic amine salt; finally, dissolving the organic amine salt into water to prepare an amine salt water solution to obtain the absorbent. An absorption method comprises the following steps: carrying out countercurrent contact on the absorbent and a gas flow containing sulfur dioxide gas so as to dissolve the sulfur dioxide into the absorbent to remove the sulfur dioxide; meanwhile, contacting an absorption solution absorbing the sulfur dioxide with steam to be regenerated, so as to realize cyclic utilization. The preparation method is simple, the reaction efficiency is high, few reaction by-products are obtained, the yield is high, the price of a solvent is low, the period is short and the production cost is low; the capacity of the prepared absorbent is large and the sulfur dioxide can be completely recycle; the absorbent can be cyclically utilized and the regeneration energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of gas purification, and in particular relates to an amine salt solution absorbent and a method for recovering sulfur dioxide from industrial waste gas. Background technique [0002] Sulfur dioxide is an important way of sulfur emission and one of the main gases of air pollution, which has attracted widespread attention. Flue gas desulfurization is an effective method to reduce sulfur emissions. Countries around the world began to study desulfurization technology in the 1950s. So far, there are more than 200 desulfurization technologies. The main methods are wet desulfurization, semi-dry desulfurization, dry desulfurization, rotary Various desulfurization processes such as spray drying desulfurization and electron beam desulfurization. [0003] Among the flue gas desulfurization technologies currently used in industry, the wet method, especially the limestone / gypsum method, is the most common. Although this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
Inventor 武乔章林敏
Owner 江苏蓝电环保股份有限公司
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